how to replace o2 sensor in bank one

took my 99 grand am to autozone, it came up with a O2 low voltage sensor failure code, the guy rented me a tool and said I can replace it. It is suppose to be before the cat. converter. Anyone ever changed one of these that can tell me where it is. I bought the sensor and rented the tool, but can't find it.....Thanks

2.4 or 3.4 engine?

the o2 sensor on the 2.4l is behind the engine, its on the exhaust manifold http://i2.photobucket.com/albums/y48/justin0717/13350.gif


if you have the 3.4 its behind the engine on the exhaust manifold as well...http://i2.photobucket.com/albums/y48/justin0717/73896.gif

or....http://i2.photobucket.com/albums/y48/justin0717/215905.gif

number 6 is the 02 sensor

p.s sorry the pics are so big....but hey you can see them :p

Thank you so much for the pictures you don't know how much that helps, thanks again. Oh ya, it's a 2.4 liter 4 cyc.

no problem, glad to help, and if ya need anything else, everyone here will be glad to help ya.